Apparatus for making carbon-black.



- G. L. CABOT.

APPARATUS FOR MAKING CARBON BLACK.

APPLICATION HLED JULY 16. 1914.

1 1 62,1 31 Patent-ed Nov. 30, 1915.

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APPARATUS FOR MAKING CARBON B tACK. APPLICATION FILED JULY I6. 1914.

Patented Nov. 30, 1915.

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+ cTiLcqmz 1/ m WW0 GODFREY LOWELL CABOT, or CAMBRIDGE, MASSACHUSETTS. I

APPARATUS FOR MAKING CARBON-BLACK}:

To all whom it mag concern: 1

Be it known that I, GODFREY L. CABOT, citizen ofthe United States, residing at' Cambridge, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Appa ratus for Making Carbon-Black; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same.

This invention relates to apparatus for making high grade carbon-black.

The object of the invention is to provlde an apparatus of this character so constructed that there isno appreciable variation of gas pressure Within the apparatus and whereby flames of absolute uniformity may be maintained, thus making possible the production of a maximum yield of uniformlyexcellent'carbon-black from a given quantity of gas.

Another object is to provide'an improved form of scraping mechanism for removing all carbon-black from the rolls which isyso mounted that ease of scraping "is obtained and yet the scrapers are so held in contact with the rolls as to efiiciently perform their scraping function. v

With these and other objects in view, the invention consists of certain novel features of construction, combination and arrange ment, of parts as will be morefullydescribed and claimed. I

In the accompanying drawings: Figure 1 is an end elevation of my improved apparatus, the supply pipe beingillustrated in section; Fig. 2 is a side elevation thereof with parts broken off; Fig.3is a longitudinal vertical sectiomtaken on the line 3--3' of Fig. 1. Fig. 1 is a transverse vertical section taken on line 4-4 of Fig. 3'; Fig. 5 is an enlarged longitudinal vertical section through the hood, rolls and scrapers,'with parts of the hood broken out; Fig. 6 is a horizontal section through the hood showing the rolls and scraping mechanism in plan, parts being broken off for convenience in illustration. .Fig. 7 is an enlarged detail longitudinal section through the riser pipe,

screw union, and pressure controlling disk;

and Fig. 8 is a detail transverse section through one of the collecting rolls.

In the embodiment illustrated, a suitable structure is shown composed of an angle iron frame 1 mounted on uprights 2.

Specification of Letters Patent; Application filed July 16, 1914. Serial No. 851,381.

Patented Nov. 36, 1915 Mounted in'this frame are cylinders or rolls I; 3, four'being here shown, upon which the carbon-black is to be first deposited. "These cylinders are tubular and are supported on rotatable shafts 4 driven by gears 5 and worms 6 on a shaft .7 to which latter, motion is imparted by a gear 8. a Disposed within the frame l'centrally under each cylinder 3 is a burner or distributing pipe 9 havin a series ofround hollow burners 10. Eac connected with a fuel supply pipe 11 by means of a reducing elbow 12 and a riser pipe 13 in which latter is mounted a screw union 14 having therein an apertured disk 15 which is designed to control the amount of the gasadmitted to the burner pipes 9. The supply pipes must be so constructed and be so proportioned to the hole in this disk 15 that there will be no appreciable diminuof thesepipes 9 is tion of gas pressurewithin'the apparatus excepting atthis disk, said pipes being sufvficiently large to avoid appreciable friction or loss of pressure in passing the gas therethrough, the bores in said disks being of a size to reduce the gas pressure to about one fiftieth of its original pressure, the burners fed by said disks being of equal size. Thus by the accurate uniformity in these disks,

uniform rflames can be maintained,-thus ren der ng 1t possible to obtain a. maximum yield of uniformly, excellent carbon-black ventilation within, the cylinder chamber and whichprotects the cylinders against drafts.

Arranged below. the cylinders 3 and burner pipesQ, is a trough shaped or hopper like'member l8 vwhichis des'ignedto shut out the-fair from the cylinders and to collect the black which isscraped therefrom by meansto be described. a crew conveyer 19 is mounted. in the bottom of this trough and is designed for removing the carbonblack therefromto a. suitablepla-ce of deposit, A

pipe 20 extends longitudinally between the cylinders 3 preferably in the alinement with the shafts 4 which support said cylinders, and this pipe is preferably of about one inch and a quarter in diameter butit may be of any vother desired size. This pipe 20 is pierced by a plurality of longitudinally spaced apertures 21 which are designed to.

receive pins22 for supporting the scrapers in operative position between the rolls or cylinders As shown, these scrapers comprise blades 23 and 24 fixed to the opposite ends of downwardly curved metal straps 25, two of said straps being'here shown connecting each pair of blades. One of these blades is positioned for contact with one of the rolls 3 and the other for contact with the other roll as is clearly showniin Fi 5. Extending centrally through these straps 25 are the pins 22 which are hung loosely in said straps and are not attached to either thestraps for the pipe which provides a slight play and permits easy scraping of the rolls. For the same reason, there is a little play provided between the straps 25 and the steel scraper blades. When the blades are assembled in operative position, the ends of one pair overlap the adjacent ends of the pair in advance thereof and gso form continuous scraping bladesextending throughout the length of the cylinders. The weight of the blades, straps and pins, is borne by the rolls or cylinders and it is sufficientto cause said blades to closely contact with the rollers and efficiently perform their scraping function. The cylinders 3 on which the carbon-black is deposited, are arranged parallel with the scraping blades 23 and. 24 bearing against the periphery of said cylinders so that on the revolution of the cylinders, the carbon is scraped off from the surface thereof and drops into the hopper or trough 18 from which it is conveyed by the screw conveyer 19 to sp ne receptacle outside the machine.

It is of course understood that the burning gas below thecylinders deposits the carbon on said cylinders which revolve above them and thus the carbon is efiiciently distributed over the surface of said cylinders preparatory to its being scraped therefrom by the blades 23 and 24:.

Acover 26 is disposed between each pair of rolls 3 and as shown is inverted V-shape v cylinders.

2. A carbon-black apparatus including revolubly mounted parallel laterally spaced depositing cylinders, burners arranged below said cylinders, a scraper support arranged between said cylinders, downwardly curved straps loosely mounted on said support midway their ends, and scraping blades loosely mounted at the ends of said straps.

3. A carbon-black apparatus including revolubly mounted parallel laterally spaced depositing cylinders, burners arranged below said cylinders, a scraper support arranged between said cylinders, downwardly curved straps loosely mounted on said support midway their ends, and scraping blades loosely mounted at the ends of said straps, said blades being connected in pairs and the pairs arranged in longitudinal alinement with the ends of one strap overlapping the ends of adjacent straps.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GODFREY LOWELL CABOT.

'Witnesses:

PERCIVAL B. MONROE, CARL L. GYBERG.

copies a: this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

a Washington, D. 0. 

